Summary

The vulnerability is due to insufficient access controls implemented by the affected software when the Remember Me option is configured on the affected system. An unauthenticated, remote attacker with knowledge of a username to target could exploit the vulnerability by submitting crafted login requests to the affected device. A successful exploit could allow the attacker to execute arbitrary commands on the device with the privileges of the user. If the user holds elevated privileges, the attacker could achieve a complete compromise of the device.

Cisco has confirmed the vulnerability in a security advisory and has released software updates.

Indicators of Compromise

Technical Information

The vulnerability is in the authentication code implemented in the affected device, and is due to insufficient verification of user cookies by the affected software when the Remember Me option is configured on the affected system.

An unauthenticated, remote attacker with knowledge of a username to target could exploit the vulnerability by submitting crafted login requests to the affected device. A successful exploit could allow the attacker to execute arbitrary code on the device with the privileges of the user. If the user holds elevated privileges, the attacker could achieve a complete compromise of the device.

Analysis

To exploit the vulnerability, the device must be configured with the Remember Me option enabled. In addition, the attacker must have knowledge of a valid username configured on the device. These requirements could reduce the likelihood of a successful exploit.

Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.

Safeguards

Administrators are advised to apply the appropriate updates.

Administrators are advised to allow only trusted users to have network access.

Administrators are advised to monitor affected systems.

Vendor Announcements

Fixed Software

Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at tac@cisco.com

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